Hewlett-packard Development Company, L.p.

Youngchae Kim

Jinhong Kim

Jinsam Park

Seongwoong Yang

Junhui Kim

Seungchan Park

Yonghun Kim

Sunghoon Oh

Provided is a waste toner container including a housing having a first reservoir and a second reservoir, a light sensor including a light emitting portion and a light receiving portion, and a light guide member to connect the light emitting portion with the light receiving portion. The light guide member includes a first detection portion and a second detection portion each including a pair of optical surfaces that are apart from each other, and the first and second detection portions are provided in the first and second reservoirs, respectively.

Structure to detect full state of two reservoirs in waste toner container

A developing device may include a housing to accommodate a developing agent, a developing roller to convey the developing agent adhered to an outer periphery of the developing roller to an outside of the housing, a regulation member positioned apart from the developing roller and having a circular cross-sectional shape to regulate a thickness of the developing agent adhered to the developing roller, and a sealing member between the regulation member and the housing to prevent leakage of the developing agent. A diameter of a central portion of the regulation member may be different from diameters of both end portions of the regulation member.

Developing device including regulation member with different diameters of central portion and both end portions

An example cartridge may be detachably attached to a main body of an image forming apparatus. The cartridge includes a rotation member and a driven coupler to receive a rotation force to rotate the rotation member. The driven coupler includes a power transmission member connected to the rotation member, an extension member extending from the power transmission member and including an outer diameter portion, a hollow portion, and a through portion, a protrusion member located at the hollow portion and movable between a protrusion position for receiving the rotation force and a retreat position, a switching member inserted into the hollow portion and movable between first and second positions for locating the protrusion member at the protrusion position and the retreat position, respectively, and an elastic member to apply an elastic force to the switching member in a direction for location at the second position.

Replaceable cartridge with driven coupler

An example toner cartridge includes a housing to accommodate toner and having a toner discharge port at one side, a conveying member inside the housing to rotate to convey the toner toward the toner discharge port, a driven coupler to rotate by a rotational force, and an ejector to rotate by the driven coupler. Either one of the driven coupler and the ejector is rotatably supported by a side wall of the housing in the longitudinal direction and connected to the conveying member to rotate the conveying member. The other one of the driven coupler and the ejector moves in a direction spaced apart from the side wall with respect to either one of the driven coupler and the ejector when the driven coupler rotates in a reverse direction which is an opposite direction to a forward direction in which the toner is conveyed toward the toner discharge port.

Growing community of inventors

Pangyo, South Korea

Youngchae Kim